Wehrli 2" Up Pipe Kit w/ Gaskets for 2001-2004 Silverado/Sierra 2500HD/3500HD LB7 Duramax - WCF100590

Key Features & Specs:

• Brand: Wehrli
• Part Number: WCF100590
• Product Type: Up pipe kit (driver & passenger side)
• Engine Compatibility: 6.6L Duramax (LB7)
• Turbo Setup: Single turbo
• Pipe Diameter: 2 inches
• Material: 11-gauge stainless steel
• Construction: Fully TIG welded
• Bellows: Heavy-duty stainless steel bellows
• Compatibility: Fits OEM and Wehrli billet exhaust manifolds
• Performance Benefits: Improved turbo spool and reduced EGTs
• Manufacturing: Made in the USA

Included Components:

• Driver side up pipe
• Passenger side up pipe
• (4) up pipe gaskets

Fitment:

• 2001-2004 Chevrolet Silverado 2500HD 6.6L Duramax (LB7)
• 2001-2004 Chevrolet Silverado 3500HD 6.6L Duramax (LB7)
• 2001-2004 GMC Sierra 2500HD 6.6L Duramax (LB7)
• 2001-2004 GMC Sierra 3500HD 6.6L Duramax (LB7)
• Designed for use with OEM or Wehrli billet exhaust manifolds (WCF100363)
• Intended for use with WCFab downpipes (other downpipes may require modification)

Upgrade your 2001-2004 LB7 Duramax with the Wehrli WCF100590 2" Up Pipe Kit, engineered to replace the restrictive and failure-prone factory up pipes. Constructed from fully TIG welded 11-gauge stainless steel, this heavy-duty kit features both driver and passenger side 2-inch up pipes designed to improve exhaust flow, increase turbo spool-up, and reduce EGTs. Unlike the OEM 16-gauge pipes, these upgraded pipes include durable stainless bellows that resist cracking and leaking under high stress. Designed for single turbo applications, this kit works with OEM or Wehrli billet exhaust manifolds and includes all necessary gaskets for installation. Proudly made in the USA, it’s a reliable performance upgrade for both stock and modified trucks.